Power cable rating examples for calculation tool verification

It is important that the current rating calculations of power cables are reliable and trustworthy. However, setting-up a current rating calculation according to the IEC 60287 standards is difficult and requires making decisions regarding the selection of the equations to use and the parameters to adopt, often in the absence of guidance provided by the standards. This often leads to different calculation results for similar cable installations depending on the engineer and the tool used to make the calculation, even in straightforward situations. CIGRE WG B1.56 has now developed both guidance on how to deliver consistent calculation results and has developed a procedure with which any calculation spreadsheet, tool, own or commercial software can be verified as recommended by CIGRE TB 640.…